Before the memorial was carved, the native Lakota Indian Tribes called the mountain "Six Grandfathers". Later, the mountain was named after Charles E. Rushmore, a well-known lawyer, after an expedition in 1885.[source?] The memorial was carved to help increase tourism in the Black Hills, where the mountain was. Doane Robinson first formed the idea in 1923.[4] Robinson convinced many influential people in the United States government to build the memorial. Congress soon allowed construction to begin.